use n instead of nvm for working iojs support
use n instead of nvm for working iojs support

Level/leveldown,mafintosh/leveldown-prebuilt,No9/leveldown,juliangruber/a-native-module-without-prebuild,phillipj/leveldown,jmanero/flat-rocks,timkuijsten/leveldown,jhead/leveldown,gastrodia/leveldown,chjj/rocksdown,jmanero/flat-rocks,ralphtheninja/leveldown,mafintosh/leveldown-prebuilt,MathieuCassagne/leveldown,timkuijsten/leveldown,jmanero/flat-rocks,No9/leveldown,gastrodia/leveldown,phillipj/leveldown,juliangruber/a-native-module,ralphtheninja/leveldown,mafintosh/leveldown-prebuilt,mafintosh/leveldown-prebuilt,juliangruber/a-native-module,juliangruber/a-native-module,Level/leveldown,phillipj/leveldown,gastrodia/leveldown,ralphtheninja/leveldown,ralphtheninja/leveldown,MathieuCassagne/leveldown,juliangruber/a-native-module-without-prebuild,timkuijsten/leveldown,chjj/rocksdown,juliangruber/a-native-module-without-prebuild,juliangruber/a-native-module,timkuijsten/leveldown,No9/leveldown,jhead/leveldown,ralphtheninja/leveldown,juliangruber/a-native-module,timkuijsten/leveldown,MathieuCassagne/leveldown,phillipj/leveldown,jmanero/flat-rocks,gastrodia/leveldown,jhead/leveldown,Level/leveldown-mobile,No9/leveldown,Level/leveldown-mobile,Level/leveldown,gastrodia/leveldown,juliangruber/a-native-module-without-prebuild,jhead/leveldown,Level/rocksdb,Level/rocksdb,chjj/rocksdown,chjj/rocksdown,juliangruber/a-native-module-without-prebuild,MathieuCassagne/leveldown,Level/leveldown-mobile,Level/leveldown-mobile,Level/rocksdb,mafintosh/leveldown-prebuilt,MathieuCassagne/leveldown,jhead/leveldown,No9/leveldown,Level/leveldown-mobile,jmanero/flat-rocks,phillipj/leveldown